Installation Guide - TACO · FCC rules. These limits are designed to provide reasonable protection against harmful interference. This equipment can radiate radio frequency energy

Installation Guide 502-006

BZU2/BZU3 Hydronic Zoning ControlSelf-Contained Interoperable Controller Model UCP-1

SUPERSEDES: April 12, 2013 EFFECTIVE: December 9, 2013Plant ID: 001-3954

SPECIFICATIONSElectrical InputsCabling: twisted shielded pair, 18 AWG recommended—500 feet max. (152 meters), 10 bit resolution

Zone 1/2/3/4/5 Temperature (BZU2): Precon Type III 10K thermistor, precon type II 10K thermistor or Taco Series T101 thru 103

Zone 1/2/3/4 Air Temperature (BZU3), Zone 1/2/3/4 Floor Temperature (BZU3): Precon Type III 10K thermistor or TS200-series

Outdoor Air Temperature (BZU3): Type III 10K thermistor

Switch Inputs (BZU2): Dry Contact, Nomally closed, software selectable, 5 Volts DC Max

Electrical Outputs Switch Outputs (BZU2), Heat Demand Circulator (BZU3), Primary/Group 1/Group 2 Circulator (BZU3), Zone 1/2/3/4 Out (BZU3): 24 VAC, 1A @ 50C, 0.5A @ 60C, limited by the Class 2 supply rating

Zone 1/2/3/4 Modulating Output (BZU3): 0-10 VDC, 2K Ohm minimum load, 8 bit resolution

Recommended Sensor Wire

Recommended LON Bus FTT-10A Network WireSpeed: 78KBPS

Max Volts: 42.4 Volts DC

Cabling: Maximum node-to-node distance: 1312 feet (400 meters); Maximum total distance: 1640 feet (500 meters)

MechanicalDimensions: 5.55” (141mm) high, 6.54” (166 mm) wide, 1.75” deep (44 mm), ABS

Controller Weight: 0.70 pounds (0.32 kilograms)

Shipping Weight: 1.0 pounds (0.46 kilograms)

Processor: 3150 Neuron 10 MHz

Cable Type Pairs Details Taco Catalog No.18AWG 1 Stranded Twisted Shielded Pair, Plenum WIR-018

Cable Type Pairs Details Taco Catalog No.Level 4 22AWG (0.65mm) 1 Unshielded, Plenum, U.L. Type CMP WIR-022

© 2013 Taco Electronic Solutions, Inc. 1

iWorx® BZU2/BZU3

Flash: 48 Kilobytes

SRAM: 8 Kilobytes

Termination: 0.197” (5.0 mm) Pluggable Terminal Blocks, 14-22 AWG

Temperature: 32 °F to 140 °F (0 °C to 60 °C)

Humidity: 0 to 90%, non-condensing

UL Listed for US and Canada, Energy Management Equipment PAZX and PAZX7

FCC Part 15 Class A compliant

Equipment LocationAbide by all warnings regarding equipment location provided earlier in this document.

Optimally, the equipment should be installed within a secure enclosure.

The equipment must be installed indoors unless contained within a protective enclosure. The enclosure must maintain internal temperature and humidity within the ranges specified for this equipment.

The equipment must be installed within 500 feet of all input peripherals (smoke detectors, sensors, etc.) that will be con-nected to the equipment. It must be within 200 feet of any connected thermostats.

Selecting a Power SourceThis equipment requires a UL recognized external power source (not supplied) to operate. The controller power input requires a voltage of 24 Volts AC.

To calculate power source current requirements, add the power consumption of all peripheral devices to that of the control-ler.

The controller and triac output loads can use the same power source. If both are using the same power source, the loads must have EMF protection. This protection can be integral to the load, or installed in the 24 VAC wiring across the load’s coil.

To provide necessary RFI and transient protection, the controller’s ground (GND) pin (T40) must be connected to earth ground or the earth ground of the packaged unit’s enclosure ground. Failure to properly ground the controller may cause it to exceed FCC limits. Excessive noise could also produce inaccurate sensor data. The power source must be capable of operating with this connection to ground.

INSTALLATION PRECAUTIONSGeneral

CAUTION: This symbol is intended to alert the user to the presence of important installation and maintenance (servicing) instructions in the literature accompanying the equipment.

CAUTION: Risk of explosion if battery is replaced by an incorrect type. Contains lithium type battery; dispose of properly.

WARNING: Electrical shock hazard. Disconnect ALL power sources when installing or servicing this equip-ment to prevent electrical shock or equipment damage.

Make all wiring connections in accordance with these instructions and in accordance with pertinent national and local elec-trical codes. Use only copper conductors that are suitable for 167 °F (75 °C).

Static ElectricityStatic charges produce voltages that can damage this equipment. Follow these static electricity precautions when handling this equipment.

2 502-006, Effective: December 9, 2013 © 2013 Taco Electronic Solutions, Inc.

iWorx® BZU2/BZU3

• Work in a static free area.• Touch a known, securely grounded object to discharge any charge you may have accumulated.• Use a wrist strap when handling printed circuit boards. The strap must be secured to earth ground.

FCC ComplianceThis equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference. This equipment can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful inter-ference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and the receiver.• Connect the equipment to a power source different from that to which the receiver is connected.• Consult the equipment supplier or an experienced radio/TV technician for help.

You are cautioned that any changes or modifications to this equipment not expressly approved in these instructions could void your authority to operate this equipment in the United States.

INSTALLATIONWarning: Electrical shock hazard. To prevent electrical shock or equipment damage, disconnect ALL power sources to controllers and loads before installing or servicing this equipment or modifying any wiring.

Mounting the Device1.Select a mounting location. Enclosure mounting is recommended. 2.Hold the controller on the panel you wish to mount it on. With a marker or pencil mark the mounting locations on the

panel. 3.Using a small drill bit pre-drill the mounting holes. 4.Using two #6 pan head screws, mount the controller to the panel. 5.Wire the controller.

502-006, Effective: December 9, 2013 3 © 2013 Taco Electronic Solutions, Inc.

iWorx® BZU2/BZU3

Figure 1: Mounting Dimensions

Grounding the DeviceThe ground terminal (T40) must be securely connected to earth ground. Failure to properly ground this equip-ment will result in improper operation. Improper grounding may also increase the risk of electrical shock and may increase the possibility of interference with radio/TV reception.

For best performance, connect the power supply common terminal (T38) to the same external point as the ground terminal (T40).

Power Requires: 24VAC (20VAC to 28VAC), requires an external Class 2 supply

Consumes: 7.2W with no external loads, maximum limited by the Class 2 supply rating


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iWorx® BZU2/BZU3


iWorx® BZU2/BZU3

BZU2 - 5 Zone Radiant Zone ControlControlled: up to 5 zone control valves or zone circulators

Sensors Required: 5 ea. Taco TS100 Series Thermostat or 5 ea. 10K Ohm Type II or III Thermistors

Setup Instructions

1.Press Controllers from main screen.

2.Select required BZU from controller list and press appropriate controller.

3.Press All Settings.

4.Press Zone 1 Settings.

5.The Zone 1 Settings menu opens.a.Specify Zone Occupied Setpoint in degrees.b.Specify Zone Offset (calibration of zone sensor). c.Select Stat Type Precon II or III (Taco #TRP-1/2

and TS100 Series Thermostats are Precon III).d.Press Save.e.Note: DO NOT change factory KP/KI settings.

Please review Factory KP/KI Setting White Paper # 508-501.

6.Repeat Step 5 for Zone Settings 2 through 5 as applicable to installation.

7.Press Unoccupied SP.

8.The Unoccupied SP menu opens.


iWorx® BZU2/BZU3

a.Specify Unoccupied Setpoint in degrees.b.Press Save.

9.Press BLR Heat Demand.

10.The BLR Heat Demand menu opens.a.If set to "On", the heat demand is communicated to

the BLM as a demand for the reset temperature from the primary loop.

b.Press Save.11.Press BLR Zone Demand.

12.The BLR Zone Demand menu opens.a.If set to "On," the max zone demand is communi-

cated to the BLM as a subzone demand for the injection pump (secondary loop).

b.Press Save.

13.Press OAT Heat Cutoff.

14.The OAT Heat Cutoff menu opens.a.Specify Outside Air Temperature above which

heating is disabled, in degrees. b.Press Save.

15.Press Next 11.


iWorx® BZU2/BZU3

16.Press Plant Alarm Enable.

17.The Plant Alarm Enable menu opens.a.Select “Disabled,” “Switch Open” (engages when

normally open switch closes) or “Switch Closed” (engages when normally closed switch opens).

b.Press Save.18.Press Zone 1 Name.

19.The Zone 1 Name menu opens.a.Specify Zone 1 Name.b.Press Save.

20.Repeat Step 15 for Zone Name 2 through 5 as applicable to the installation.


iWorx® BZU2/BZU3

BZU3 - 4 Zone Radiant Zone ControlControlled: up to 4 0-10 VDC modulating zone control valves or zone circulators

Sensors Required: 4 ea. Taco TS200 Series Thermostats with or without 4 ea. TRP-2 10K Ohm Type III Thermistors, TOA-1 Outside Air Temp Sensor

Setup Instructions

1.Press Controllers from the main screen.2.Select required BZU from controller list and press

appropriate controller.

3.Press All Settings.4.Press Zone 1 Config.

5.The Zone 1 Config menu opens.a.Select Zone Output Type.

-“Digital” = On/Off switched output.

-“Analog” = 0-10VDC modulating output.

b.Select Group. Grouping allows zones to be assigned to an associated Group Circ Output, either 1 or 2.

c.Commissioning allows a Zone and its associated Group Circ (if applicable) to be forced on for testing and commissioning of system. Must be placed “OFF” for normal operation.

d.Press Save.6.Repeat Step 5 for Zone Config 2 through 4 as appli-

cable to the installation.7.Press Zone 1 Settings.

8.The Zone 1 Settings menu opens.a.Select Stat Type.

-“Precon III” (TS100 Series or TRP Sensor)

-“Precon II” (10K OHM Type II Thermistor)

-“TS200” Series (shown)

-“Not Used “(Unused zone)

b.Select Radiant Mode.-“Space Mode” (Wall Sensor Only)

-“Floor Mode” (Floor Sensor Only)

-“Space with Floor Mode” (TS200 Shown, Wall and Floor Sensor used)

c.Specify Zone Occupied Setpoint in degrees.d.Specify Floor Occupied Temp Min in degrees.e.Specify Floor Unoccupied Temp Min in degrees.f. Specify Floor Temp Max in degrees.


iWorx® BZU2/BZU3

g.Specify Space Temp Max in degrees.h.Press Save.

9.Repeat Step 8 for Zone Settings 2 through 4 as applicable to the installation.

10.Press Zone 1 Mod. NOTE: Modulating Valve Settings only apply for applications utilizing 0-10VDC Zone Modu-lating Valves or Circulators. Skip Steps 10 and 11 if ON/OFF outputs are used.

11.The Zone 1 Mod menu opens.a.Select Gain from -4 to +5. Only adjust this setting

when zone response is lagging or overreacting.b.Specify ON %. Sets the minimum zone call %

demand before zone reacts to a call.c.Specify Ramp Up %. Selects the % steps ramping

up for zone call.d.Specify Ramp Down %. Selects the % steps ramp-

ing down from a zone call.e.Specify Output Min in VDC. Usually 0 or 2VDC.

(See mod. Zone valve or circulator mfg. recom-mendations.)

f. Specify Output Max in VDC. Usually 10VDC. (See mod. Zone valve or circulator mfg. recommenda-tions.)

g.Press Save.12.Repeat Step 11 for Zone Mod 2 through 4 as appli-

cable to the installation.

13.Press Next 20.

14.Press Unoccupied SP.

15.The Unoccupied SP menu opens.a.Specify Unoccupied Setpoint in degrees.b.Press Save.


iWorx® BZU2/BZU3

16.Press Demand Type.

17.The Demand Type menu opens. Applies to systems utilizing TS204 Thermostat and DXU3/4 as a master zone control.a.Select:

-“Lowest Temp” - The demand of the zone with the lowest space/floor temperature is sent to the master controller.

-“Average” - The average demand from all zones is sent to the master controller.

-“Master” - The demand from the master zone is sent to the master controller.

b.Press Save.18.1Press Master Zone.

19.The Master Zone menu opens. Utilized when "Mas-ter" was selected in step 17.a.Select Master Zone, Number 1,2,3 or 4.b.Press Save.

20.Press OAT Heat Cutoff.

21.The OAT Heat Cutoff menu opens.a.Specify Outside Air Temperature above which

heating is disabled, in degrees. b.Press Save.

22.Press Zone 1 Name.

23.The Zone 1 Name menu opens.a.Specify Zone 1 Name.b.Press Save.

24.Repeat Step 23 for Zone Name 2 through 4 as applicable to the installation.


iWorx® BZU2/BZU3

25.Press Next 10.

26.Press Heat Demand.

27.The Heat Demand menu opens.a.If set to "On,” the heat demand is communicated to

the BLM as a demand for the reset temperature from the primary loop.

b.Press Save.

28.Press Zone Demand.

29.The Zone Demand menu opens.a.If set to "On,” the max zone demand is communi-

cated to the BLM as a subzone demand for the injection pump (secondary loop).

b.Press Save.30.Press Space Temp Alarms.

31.The Space Temp Alarms menu opens.a.Specify High Temp Alarm in degrees.b.Specify Low Temp Alarm in degrees.c.Specify High Floor Alarm in degrees.d.Specify Low Floor Alarm in degrees.e.Press Save.


iWorx® BZU2/BZU3

TROUBLESHOOTINGDiagnostic LEDsThe controller has 3 LED indicators. These indicators can aid in troubleshooting equipment operation problems. The follow-ing table lists the functions of the controller’s LEDs in the order they appear from left to right on the unit.

Figure 2: BZU2/BZU3 Controller LEDs

Status Network Service

LED IndicationStatus – Solid green when running and configured by an LCI (networking)

– Flashing green when running and NOT configured by an LCI (stand-alone)– Solid red when a fault condition exists (control shut down)– Blinking Red - the controller has a device failure– Solid Amber - The controller has not received a LCI ping message in over 10 minutes and is part of a network.

Network – Yellow while the controller is transmitting data onto the FTT-10A network – Green when there is network activity– Off when there is no network activity

Service – Illuminated when the service pin is depressed or when a controller gets configured by the LCI.


iWorx® BZU2/BZU3

Troubleshooting Tips

Getting HelpComponents within an iWorx® controller, sensor, or power supply cannot be field repaired. If there is a problem with a unit, follow the steps below before contacting your local TES representative or TES technical service.

1.Make sure controllers, sensors, and power supplies are connected and communicating to desired devices.2.Record precise hardware setup indicating the following:

Version numbers of application software.

Device and/or firmware version number.

A complete description of difficulties encountered.

REPRESENTATIONS AND WARRANTIESThis Document is subject to change from time to time at the sole discretion of Taco Electronic Solutions, Inc. All updates to the Document are available at www.taco-hvac.com. When installing this product, it is the reader’s responsibility to ensure that the latest version of the Document is being used.

iWorx® products shall only be used for the applications identified in the product specifications and for no other purposes. For example, iWorx® products are not intended for use to support fire suppression systems, life support systems, critical care applications, commercial aviation, nuclear facilities or any other applications where product failure could lead to injury to person, loss of life, or catastrophic property damage and should not be used for such purposes.

Problem SolutionController is not running and Status LED is not illuminated.

No power to controller. Verify the voltage on the controller’s power connector (24 VAC).

How do I reset the controller? The controller can be reset by the LCI, or you can cycle power to the controller. Refer to the LCI documentation for more information on resetting the controller using the LCI.

A zone pilot relay will not come on even though the LCI indicates it is on.

Ensure that the controller and output pilot relay have been powered with 24 VAC and the output has been correctly wired to the coil of the pilot relay. Also ensure that the pilot relay has a 24 VAC coil. Ensure that the output jumpers are in the right position for this application (isolated group, power sourcing or power sink-ing).

The 10K thermistor reading is out of range.

The input is either shorted or open.

Thermistor readings fluctuate rapidly, sometimes by several degrees.

The controller is not properly grounded. The controller’s ground (GND) pin (T40) must be connected to earth ground.Also ensure that the controller’s digital inputs are dry contacts and that no volt-age is being applied or switched to the inputs.

Controller is not running and Status LED is not illuminated.

No power to controller. Verify the voltage on the controller’s power connector (24 VAC).

Why is my pump short cycling? Ensure that the temperatures are properly grounded and that the PI Parameters are set properly. Kp should be between 5-10% and Ki should be set between 5-10Min.

Why is my space cold in the morning? The setpoint is at 70 °F but the room is still at the Unoccupied Temperature.

When a radiant zone enters the occupied mode after a night setback, the room needs to heat up and this takes longer than a conventional forced air heating. To avoid situations like that, schedule your occupied time 30 min (or the desired warm-up time for your individual situation) before you get up or expect the tem-perature to have reached the comfort point.


iWorx® BZU2/BZU3

Taco Electronic Solutions, Inc. will not be responsible for any product or part not installed or operated in conformity with the Document and instructions or which has been subject to accident, disaster, neglect, misuse, misapplication, inadequate operating environment, repair, attempted repair, modification or alteration, or other abuse. For further information, please refer to the last page of this Document for the company’s Limited Warranty Statement, which is also issued with the product or available at www.taco-hvac.com.

APPLICABLE DOCUMENTATION

Notes:

Part Number Audience PurposeiWorx® BZU2/BZU3 Application Guide, Document No. 505-006

iWorx® BZU3 Application Guide, Document No. 505-038

– Application Engineers– Wholesalers– Contractors

Provides specific application information about the BZU series, including sequence of operation and configuration information.

iWorx® LCI Application Guide, Document No. 505-002

iWorx® LCI3 Application Guide, Document No. 505-050

– Application Engineers– Installers– Service Personnel– Start-up Technicians– End user

Provides instructions for setting up and using the iWorx® Local Control Interface.

iWorX DXU3 Application Guide, Document No. 505-004

iWorX DXU4 Application Guide, Document No. 505-005

– Application Engineers– Installers– Service Personnel– Start-up Technicians– End user

Provides specific application information about the DXU series, including sequence of operation and configuration information.

http://www.iWorxWizard.com – Application Engineers– Wholesalers– Contractors

An on-line configuration and submittal package gen-erator based on user input. Automatically generates bill of materials, sequence of operations, flow dia-grams, wiring diagrams, points and specifications.

Additional Documentation

LonWorks FTT-10A Free Topology Transceiver User’s Guide, published by Echelon Corpora-tion. It provides specifications and user instructions for the FTT-10A Free Topology Trans-ceiver.


iWorx® BZU2/BZU3


iWorx® BZU2/BZU3


iWorx® BZU2/BZU3

Printed in the USA iWorx® and iView® are registered trademarks of Taco Electronic Solutions, Inc. © 2013 Taco Electronic Solutions, Inc. LON, LONWORKS, & LONMARK are trademarks of Echelon Corporation

CONTROLS MADE EASY®

Taco Electronic Solutions, Inc., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.

Taco (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436.

Taco Electronic Solutions, Inc. is a subsidiary of Taco, Inc. Visit our web site at: http://www.taco-hvac.com

Taco Electronic Solutions, Inc. (TES) will repair or replace without charge (at the company's option) any product or part which is proven defective under normal use within one (1) year from the date of start-up or one (1) year and six (6) months from date of shipment (whichever occurs first).

In order to obtain service under this warranty, it is the responsibility of the purchaser to promptly notify the local TES stocking distributor or TES in writing and promptly deliver the subject product or part, delivery prepaid, to the stocking distribu-tor. For assistance on warranty returns, the pur-chaser may either contact the local TES stocking distributor or TES. If the subject product or part contains no defect as covered in this warranty, the purchaser will be billed for parts and labor charges in effect at time of factory examination and repair.

Any TES product or part not installed or operated in conformity with TES instructions or which has been subject to accident, disaster, neglect, mis-use, misapplication, inadequate operating envi-ronment, repair, attempted repair, modification or alteration, or other abuse, will not be covered by this warranty.

TES products are not intended for use to support fire suppression systems, life support systems, critical care applications, commercial aviation, nuclear facilities or any other applications where product failure could lead to injury to person, loss of life, or catastrophic property damage and should not be sold for such purposes.

If in doubt as to whether a particular product is suitable for use with a TES product or part, or for any application restrictions, consult the applica-ble TES instruction sheets or in the U.S. contact TES at 401-942-8000 and in Canada contact Taco (Canada) Limited at 905-564-9422.

TES reserves the right to provide replacement products and parts which are substantially similar in design and functionally equivalent to the defective product or part. TES reserves the right to make changes in details of design, construc-tion, or arrangement of materials of its products without notification.

TES OFFERS THIS WARRANTY IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY IMPLIED BY LAW INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS IS IN EFFECT ONLY FOR THE

DURATION OF THE EXPRESS WARRANTY SET FORTH IN THE FIRST PARAGRAPH ABOVE.

THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR STATUTORY, OR ANY OTHER WARRANTY OBLIGATION ON THE PART OF TES.

TES WILL NOT BE LIABLE FOR ANY SPE-CIAL, INCIDENTAL, INDIRECT OR CONSE-QUENTIAL DAMAGES RESULTING FROM THE USE OF ITS PRODUCTS OR ANY INCI-DENTAL COSTS OF REMOVING OR REPLAC-ING DEFECTIVE PRODUCTS.

This warranty gives the purchaser specific rights, and the purchaser may have other rights which vary from state to state. Some states do not allow limitations on how long an implied warranty lasts or on the exclusion of incidental or conse-quential damages, so these limitations or exclu-sions may not apply to you.

LIMITED WARRANTY STATEMENT

Documents

Installation Guide - TACO · FCC rules. These limits are designed to provide reasonable protection against harmful interference. This equipment can radiate radio frequency energy